-struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
-struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr);
-int write_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf);
-int dirty_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf);
-int clean_tree_block(struct btrfs_root *root, struct btrfs_buffer *buf);
-int btrfs_commit_transaction(struct btrfs_root *root,
- struct btrfs_super_block *s);
-struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
-int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
-void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
-int write_ctree_super(struct btrfs_root *root, struct btrfs_super_block *s);
-int mkfs(int fd, u64 num_blocks, u32 blocksize);
-
-#define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
+/*
+ * Modes of superblock access
+ */
+enum btrfs_read_sb_flags {
+ SBREAD_DEFAULT = 0,
+ /* Reading superblock during recovery */
+ SBREAD_RECOVER = (1 << 0),
+
+ /*
+ * Read superblock with the fake signature, cannot be used with
+ * SBREAD_RECOVER
+ */
+ SBREAD_PARTIAL = (1 << 1),
+};
+
+/*
+ * Use macro to define mirror super block position,
+ * so we can use it in static array initialization
+ */
+#define BTRFS_SB_MIRROR_OFFSET(mirror) ((u64)(SZ_16K) << \
+ (BTRFS_SUPER_MIRROR_SHIFT * (mirror)))
+
+static inline u64 btrfs_sb_offset(int mirror)
+{
+ if (mirror)
+ return BTRFS_SB_MIRROR_OFFSET(mirror);
+ return BTRFS_SUPER_INFO_OFFSET;
+}
+
+struct btrfs_device;
+
+int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror);
+struct extent_buffer* read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
+ u64 parent_transid);
+
+int read_extent_data(struct btrfs_fs_info *fs_info, char *data, u64 logical,
+ u64 *len, int mirror);
+void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
+ u64 parent_transid);
+struct extent_buffer* btrfs_find_create_tree_block(
+ struct btrfs_fs_info *fs_info, u64 bytenr);
+
+void btrfs_setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
+ u64 objectid);
+int clean_tree_block(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, struct extent_buffer *buf);
+
+void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
+struct btrfs_fs_info *btrfs_new_fs_info(int writable, u64 sb_bytenr);
+int btrfs_check_fs_compatibility(struct btrfs_super_block *sb,
+ unsigned int flags);
+int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info, u64 root_tree_bytenr,
+ unsigned flags);
+void btrfs_release_all_roots(struct btrfs_fs_info *fs_info);
+void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info);
+int btrfs_scan_fs_devices(int fd, const char *path,
+ struct btrfs_fs_devices **fs_devices, u64 sb_bytenr,
+ unsigned sbflags, int skip_devices);
+int btrfs_setup_chunk_tree_and_device_map(struct btrfs_fs_info *fs_info,
+ u64 chunk_root_bytenr);
+
+struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr,
+ unsigned flags);
+struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
+ unsigned flags);
+struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
+ u64 sb_bytenr, u64 root_tree_bytenr,
+ u64 chunk_root_bytenr,
+ unsigned flags);
+int close_ctree_fs_info(struct btrfs_fs_info *fs_info);
+static inline int close_ctree(struct btrfs_root *root)
+{
+ if (!root)
+ return 0;
+ return close_ctree_fs_info(root->fs_info);
+}
+
+int write_all_supers(struct btrfs_fs_info *fs_info);
+int write_ctree_super(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info);
+int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr,
+ unsigned sbflags);
+int btrfs_map_bh_to_logical(struct btrfs_root *root, struct extent_buffer *bh,
+ u64 logical);
+struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info,
+ u64 bytenr, u32 blocksize);
+struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
+ struct btrfs_key *location);
+struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info,
+ struct btrfs_key *location);
+int btrfs_free_fs_root(struct btrfs_root *root);
+void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
+int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
+u32 btrfs_csum_data(char *data, u32 seed, size_t len);
+void btrfs_csum_final(u32 crc, u8 *result);
+
+int btrfs_open_device(struct btrfs_device *dev);
+int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize,
+ int verify);
+int verify_tree_block_csum_silent(struct extent_buffer *buf, u16 csum_size);
+int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
+int write_tree_block(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info,
+ struct extent_buffer *eb);
+int write_and_map_eb(struct btrfs_fs_info *fs_info, struct extent_buffer *eb);